• The Journal of Advanced Prosthodontics
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• 제9권4호
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• pp.302-307
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• 2017

PURPOSE. This study compared the SCGAs measured in three types of radiographic images (panoramic, CBCT panoramic-section, and CBCT cross-section images) with values measured using the protrusive occlusal record. MATERIALS AND METHODS. SCGAs were measured in 20 patients on a semi-adjustable articulator using the protrusive interocclusal record. Panoramic and CBCT images were obtained. SCGAs were measured on CBCT images in panoramic and cross sections. In all of the radiographic images, SCGAs were measured using the Frankfort horizontal reference line and the mean curvature line. The most-superior and most-inferior points of the curvatures were identified to determine the mean curvature line. Each measurement was performed twice by two operators independently. The data were analyzed by the t-test, Pearson's correlation test, and Cronbach's ${\alpha}$ using SPSS (${\alpha}=.05$). RESULTS. The mean right and left SCGAs were as follows: protrusive occlusal record (30.1 and 30.2 degrees, respectively), panoramic (38.9 and 38.7 degrees), CBCT panoramic sections (35.4 and 36.8 degrees), and CBCT cross sections (35.3 and 36.1 degrees). The SCGAs differed significantly among the groups. The Pearson coefficients for the correlations with the protrusive occlusal record measurements on the left and right sides were as follows: panoramic (0.834 and 0.791, respectively), CBCT panoramic-section (0.918 and 0.837), and CBCT cross-section (0.918 and 0.845) images. CONCLUSION. Strong correlations were found between SCGAs obtained using radiographic images and the protrusive occlusal record.

• 구강회복응용과학지
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• 제19권3호
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• pp.169-183
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• 2003

According to our recent investigation that the increase in the occlusal vertical dimension made the appendage muscle strength got higher, the occlusal appliances were made by increasing the occlusal vertical dimension "from the centric relation" position of the mandible. In this experiment, the authors tried to study the change in the appendage muscle strength due to increase in occlusal vertical dimension from intercuspal position(ICP) of mandible with the same subjects and manner as the former experiment. For this study, ten male athletes in a mean age of 23 year who were joined the former study were selected. All the subjects had a complete or almost complete set of natural teeth and reported no subjective symptoms of temporomandibular disorders. Upper and lower casts were mounted on the semi-adjustable articulator at the intercuspal position and a point was marked on the attached gingival area between the right canine and the right 1st. premolar in each upper and lower cast. From the points, the occlusal vertical dimension was increased by 2mm, 3.5mm and 5mm, and then each 10 maxillary type occlusal splint at each 3-increased position were fabricated with heat curing clear acrylic resin. Including the intercuspal position, the 3 kinds of occlusal splints were placed on the subjects individually, and then isokinetic muscle strength on 7 parts of the human appendage which are shoulder, knee, ankle, wrist, forearm, elbow and hip was measured with the CYBEX 6000 SYSTEM (Lumex, NewYork, USA). The results were as follows: The highest mean value in muscular strength was shown at the position of 2mm-increased vertical dimension. The muscle strength during internal/external rotation of shoulder and knee, plantarflexion of ankle, flexion of elbow, and flexion and extension of hip at the increased occlusal vertical dimension position were significantly higher than them at the intercuspal position (p<0.05). Only in view of the increase in the appendage muscle strength, regardless of the way of making the occlusal splints by elevating the occlusal vertical dimension from the centric relation position or intercuspal position, the occlusal splints had an effect on the increase of isokinetic muscle strength at the occlusal vertical dimension which increased within the proper range on the habitual arc of closure.

• 대한치과보철학회지
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• 제51권3호
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• pp.153-159
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• 2013

연구 목적: 근래에 들어 체크바이트 법뿐만 아니라 디지털 센서를 이용하여 하악의 운동을 기록, 분석하여 과로각을 계산하는 방법이 개발되어 사용되어져 오고 있으나 두 방법간의 비교하는 연구는 없었다. 이에 새로운 방법인 ARCUSdigma 2 system을 이용한 방법과 전통적인 방법인 체크바이트 법으로 과로각을 측정하여 두 방법 간의 차이를 비교해 보고자 하였다. 연구 대상 및 방법: 교정치료의 경험이 없고, 제3대구치를 제외한 치아의 결손이 없고, 교합평면의 변화를 수반한 광범위한 수복이 없으며, 악관절 질환이 없는 24세부터 34세 사이의 건강한 젊은 성인 남녀(남 10명, 여 10명)를 대상으로 하여 Camper's plane을 기준으로 하여 ARCUSdigma 2 system과 왁스를 사용한 체크바이트법을 각각 3번씩 측정하였으며 교합기는 KaVo Protar Evo 7 반조절성 교합기를 사용하여 각각의 방법으로 과로경사각을 측정하였다. 두 방법 간의 자료를 SPSS 20을 이용한 Mann-Whitney U Test를 사용하여 통계적으로 분석하였다. 결과: 1. ARCUSdigma 2 system에서 전방시상과로각은 좌우 각각 $26.97^{\circ}({\pm}7.38^{\circ})$, $29.80^{\circ}({\pm}8.19^{\circ})$로 측정되었으며, 측방과로경사각은 $5.75^{\circ}({\pm}3.47^{\circ})$와 $8.10^{\circ}({\pm}4.98^{\circ})$로 측정되었다. 2. 체크바이트법에서 전방시상과로각은 좌우 각각 $25.20^{\circ}({\pm}6.53^{\circ})$, $28.18^{\circ}({\pm}7.38^{\circ})$로 측정되었으며, 측방과로경사각은 $10.97^{\circ}({\pm}5.63^{\circ})$와 $12.03^{\circ}({\pm}5.22^{\circ})$로 측정되었다. 결론:두 방법 모두 남녀간 좌우간 유의적 차이는 나타나지 않았으며 두 방법 사이에서는 측방시상과로각에서 ARCUSdigma 2를 사용하여 측정한 값이 Checkbite를 사용하여 측정한 값보다 통계적으로 유의하게 작게 측정되었다(P<.05).